Writing instrument with sport ball top



FIG. 1 is a top view of the writing instrument with sport ball top showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a writing instrument with sport ball top, as shown and described. 